Major triple yang in clinical terms refers to hepatitis B major triple yang, a state in which the hepatitis B virus is positive for surface antigen, hepatitis B core antibody and hepatitis B e antigen in a two-to-one test. It is possible to be infected through meals, because the transmission of hepatitis B virus is mainly through blood and body fluids, as well as mother-to-child transmission and sexual transmission. In general, patients with hepatitis B major triplet do not transmit the virus to their families through meals. Although hepatitis B virus can be isolated from the patient’s saliva, the saliva contains very small amounts of hepatitis B virus, which generally does not cause transmission. Even if a family member becomes infected with a very small amount of virus through a break in the mucous membrane of the mouth or digestive tract, the virus can generally be cleared through the body’s immunity and does not cause infection. However, in rare cases, patients with a high viral load of hepatitis B major triple-positive patients and their family members who eat together at the same time have oral mucous membrane damage, the hepatitis B virus may come into direct contact with the damaged mucous membrane through saliva, forming a body fluid transmission and thus causing infection. Therefore, it is recommended that patients with hepatitis B major triple-positive actively undergo antiviral treatment, if the hepatitis B virus gene has been negative, even if the oral mucous membrane breakage occurs at the same time with the family members eating together, it will not cause transmission. However, it is still recommended that family members and hepatitis B major triple-positive patients implement a separate meal system and disinfect tableware well. If the family has a joint meal system, it is recommended that the family members go to the hospital for consultation and be vaccinated against hepatitis B under the guidance of a doctor.